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(ArPkStream.Read): optimized with BinarySearch.

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This commit is contained in:
morkt 2018-01-29 06:20:16 +04:00
parent 13da37b2d9
commit 482e679e58
1 changed files with 11 additions and 4 deletions
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13
ArcFormats/PalmTree/ArcAR.cs
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@ -94,10 +94,16 @@ namespace GameRes.Formats.PalmTree
this.Position = pos; this.Position = pos;
} }
count = BaseStream.Read (buffer, offset, count); count = BaseStream.Read (buffer, offset, count);
if (0 == count)
return count;
long buf_pos = pos; long buf_pos = pos;
long buf_end = buf_pos + count; long buf_end = buf_pos + count;
foreach (long ar_pos in m_ar_blocks) int index = m_ar_blocks.BinarySearch (buf_pos-1);
if (index < 0)
index = ~index;
for (; index < m_ar_blocks.Count; ++index)
{ {
var ar_pos = m_ar_blocks[index];
if (buf_end <= ar_pos) if (buf_end <= ar_pos)
break; break;
if (buf_pos >= ar_pos+2) if (buf_pos >= ar_pos+2)
@ -105,8 +111,9 @@ namespace GameRes.Formats.PalmTree
int signature_pos = (int)(ar_pos - pos); int signature_pos = (int)(ar_pos - pos);
if (signature_pos >= 0) if (signature_pos >= 0)
buffer[offset+signature_pos] = (byte)'P'; buffer[offset+signature_pos] = (byte)'P';
if (signature_pos + 1 >= 0) ++signature_pos;
buffer[offset+signature_pos+1] = (byte)'K'; if (signature_pos >= 0 && signature_pos < count)
buffer[offset+signature_pos] = (byte)'K';
buf_pos = ar_pos + 2; buf_pos = ar_pos + 2;
} }
return count; return count;